This dissertation explores the adoption and impact of International Financial Reporting Standards (IFRS) in the UK retail sector, with a specific focus on Tesco, a major player in the market. The study begins by outlining the background of IFRS implementation and its importance for transparency and consistency in financial reporting across the retail industry. The research aims to evaluate the operational effects and strategic implications of IFRS, particularly standards 16, 15, and 9, which deal with leases, revenue recognition, and financial instruments, respectively.